ANGPTL2 and primary central nervous system lymphoma: The complete response (CR) rate was 33.3% in the high-level group versus 66.7% in the low-level group (<i>p</i> = 0.003), and the overall response (OR) rate was 35.9% versus 74.4% (<i>p</i> = 0.001).<h4>Conclusion</h4>CSF exosomal ANGPTL2 is a novel, independent prognostic marker in PCNSL.